Originally published at: https://tutorials.datasciencedojo.com/one-versus-one-vs-one-versus-all-data-science-in-minutes/
In this quick machine learning tutorial, we introduce you to the concepts of one versus one vs. one versus all in classification. In classification models, you will often want to predict one class from another. This is called binary classification, or one-versus-one. But what if you have more than two classes to predict? This is where one-versus-all is introduced. We will explain the difference between these two classification techniques, and describe scenarios where you may want to use one over the other.